[Test-Equipment] Does it really make a difference over the short haul ????

[Dave Mantor]

Hi Robert,
This is Dave w9ocm in Fairmount, Indiana.  I can’t seem to find your email
address in my data.  I’d like to e-visit with you re: to equipment I sold
you 7-8 years ago for a half-track.
Could you email me at dmj.mantor at gmail.com...??
Many thanks.
Dave w9ocm

On Fri, Sep 4, 2020 at 12:57 AM Robert Downs via Test-Equipment <
test-equipment at mailman.qth.net> wrote:

> Besides the difference in center pin diameter, the coax OD's are
> noticeably different.  For example, RG-58/U is much smaller OD than is
> RG-59/U.
>
> Robert Downs
>
>
> -----Original Message-----
> From: test-equipment-bounces at mailman.qth.net [mailto:
> test-equipment-bounces at mailman.qth.net] On Behalf Of Bill Weinel
> Sent: Thursday, September 3, 2020 09:21
> To: Discussion of Electronic Test Equipment; Glenn Little WB4UIV
> Subject: Re: [Test-Equipment] Does it really make a difference over the
> short haul ????
>
> I used Trompter patch panels in my former occupation for routing L-band
> (950Mhz~1500Mhz) as well as HD video for 15+ years and they worked
> great. Some models do have internal termination resistors in circuit
> when no plug is inserted (it depends upon the model... not all have
> them.)  As others have stated, be careful to match the type of BNC
> connectors used with the impedance rating of the patch panel as there
> are differences in the diameter of the center pins (...which can do
> damage to the BNC jacks to the patch panel rear connectors if too large,
> or can cause intermittent connections if too small.) As far as impedance
> differences, at worst using a mismatched connector will cause a slight
> bump in the impedance plot on a VNA. In my experience it usually isn't
> significant.
>
> 73 Bill W4WHW
>
> ______________________________________________________________
> Test-Equipment mailing list
> Home: http://mailman.qth.net/mailman/listinfo/test-equipment
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Test-Equipment at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>